chore: Add ability to get classDefs from classDb

[yari-dewalt]

📑 Summary

Creates and exposes public function to fetch classDefs inside the classDb. Also includes change to properly split styles when inserting into its object styles array.

📏 Design Decisions

getClassDefs() returns the defined style classes from inside the classDb so we have access to them.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
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Latest commit: 822fa78

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commit: 822fa78

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 3.88%. Comparing base (446f6a7) to head (822fa78).

Files with missing lines	Patch %	Lines
packages/mermaid/src/diagrams/class/classDb.ts	0.00%	7 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #6190   +/-   ##
=======================================
  Coverage     3.88%   3.88%           
=======================================
  Files          399     398    -1     
  Lines        42055   42048    -7     
  Branches       638     638           
=======================================
  Hits          1635    1635           
+ Misses       40420   40413    -7     

Flag	Coverage Δ
unit	3.88% <0.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/mermaid/src/diagrams/class/classDb.ts	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

[yari-dewalt]

E2E tests failing as of right now due to argos but they should actually be good.

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[ashishjain0512]

See my comment

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Feb 26, 2025, 6:42 PM

[ashishjain0512]

@yari-dewalt Please look at @sidharthv96 comments, and resolve them, so that we can move forward with this PR

[yari-dewalt]

@ashishjain0512 Resolved, however like @sidharthv96 mentioned since getClassDefs() is only going to be used in alana we can keep the rest and move this part into a separate pr for alana? Or should we just include it in mermaid? Thoughts?